# nfsd: fix stale s2s_cp_stateids IDR entry for async COPY

CVE record · `CVE-2026-89676`

- **Identifiers:** `CVE-2026-89676`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before 745b2edfdd96b8738a94dee450adff4c7d026d5b` (git)
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before bdce362f49410b9def65d76c21f6259cd89696d8` (git)
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before 7aa34ea78f74e6ef60c8112635a87fc43d57f6c9` (git)
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before 9b4e5e9ba5ae13808b8a6d229d87c54611ba0e7a` (git)
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before 14b978e8d05ce018d0afbeb6611833ef91713a02` (git)
  - affected: `e0639dc5805a9d4faaa2c07ad98fa853b9529dd3 to before d0beaee498e11880e72826026db0e9c9890fc114` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.20`
  - unaffected: `before 4.20` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89676](https://www.cve.org/CVERecord?id=CVE-2026-89676)
- [NVD: CVE-2026-89676](https://nvd.nist.gov/vuln/detail/CVE-2026-89676)

### References from the CNA

- <https://git.kernel.org/stable/c/745b2edfdd96b8738a94dee450adff4c7d026d5b>
- <https://git.kernel.org/stable/c/bdce362f49410b9def65d76c21f6259cd89696d8>
- <https://git.kernel.org/stable/c/7aa34ea78f74e6ef60c8112635a87fc43d57f6c9>
- <https://git.kernel.org/stable/c/9b4e5e9ba5ae13808b8a6d229d87c54611ba0e7a>
- <https://git.kernel.org/stable/c/14b978e8d05ce018d0afbeb6611833ef91713a02>
- <https://git.kernel.org/stable/c/d0beaee498e11880e72826026db0e9c9890fc114>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-89676>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89676/>. Everything for agents: <https://agentprime.io/llms.txt>.